LED Driver LCA PRE OTD Product Manual

Transcription

1 LED Driver LCA PRE OTD Product Manual

2 Table of Contents Table of contents 1 Validity Copyright Imprint General safety instructions Intended use Dangers associated with the operation of the system Environment Additional instructions Description and key features Description of key features Main values and functions Housing variants Adjustable output current Compatibility between LED module and LED Driver Comparison of data sheet values with a 5-point guideline Application of the 5-point guideline Practical tests Installation notes Safety information Function of the earth terminal Routing the wires External fuse for DC operation Maximum loading of circuit breakers Functions corridorfunction V DSI switchdim Power-up Fading DALI ready2mains Constant Light Output DC recognition c 2 / 60

3 Table of Contents 6.8 DC recognition Dimming on DC Intelligent Temperature Guard Intelligent Voltage Guard Surge Burst protection chronostep Reference list Additional information Downloads Technical data c 3 / 60

4 Scope of documentation 1. Validity These operating instructions are valid for LED Drivers of the LCA PRE OTD series. TRIDONIC GmbH & Co KG is constantly striving to develop all its products. This means that there may be changes in form, equipment and technology. Claims cannot therefore be made on the basis of information, diagrams or descriptions in these instructions. The latest version of these operating instructions is available on our home page at Copyright This documentation may not be changed, expanded, copied or passed to third parties without the prior written agreement of TRIDONIC GmbH & Co KG. We are always open to comments, corrections and requests. Please send them to 1.2. Imprint Tridonic GmbH & Co KG Färbergasse Dornbirn Austria T F c 4 / 60

5 General safety instructions 2. General safety instructions The instructions in this section have been compiled to ensure that operators and users of LED Drivers of the LCA PRE OTD series from Tridonic are able to detect potential risks on time and take the necessary preventative measures. The operator must ensure that all users fully understand these instructions and follow them. This device may only be installed and configured by suitably qualified personnel Intended use Proper use Operation of LED light modules. The device may only be used for this intended purpose Improper use Outdoor use. Extensions and modifications to the product. ½ WARNING! Improper use could result in injury, malfunction or damage to property. It must be ensured that the operator informs every user of existing hazards Dangers associated with the operation of the system ½ DANGER! Danger of electrocution Disconnect the power of the entire lighting system before working on the lighting system! 2.3. Environment ½ DANGER! Not to be used in corrosive or explosive environments. ½ CAUTION! Risk of damage caused by humidity and condensation Use use the control device only in dry rooms and protect it against humidity! Prior to commissioning the system, wait until the control device is at room temperature and completely dry! c 5 / 60

6 General safety instructions 2.4. Additional instructions ½ CAUTION!... Electromagnetic compatibility (EMC) Although the device meets the stringent requirements of the appropriate directives and standards on electromagnetic compatibility, it could potentially interfere with other devices under certain circumstances! c 6 / 60

7 Description and key features 3. Description and key features 3.1. Description of key features LCA PRE OTD is a specially designed portfolio for outdoor and industrial applications. It has been optimised to meet the hardest requirements in outdoor LED applications.... Special design: The LCA PRE OTD offer a safe and reliable solution under difficult weather and electrical circumstances (e.g. street and roadlight, tunnel, carpark) Lifetime: Excellent lifetime thanks to special design Safety: Up to 10 kv surge/burst protection Thermomanagement: t a up to 70 C with 65,000 hours lifetime State-of-the-art dimming technology: Stepless dimming from 100 to 10 % Diversity of functions: Dimming, DALI, DSI, switchdim, corridorfunction, ready2mains, chronostep, U6Me2 (cabinet programming) c 7 / 60

8 Main values and functions 3.2. Main values and functions Dimming Portfolio Description Dimmable Dimming method Amplitude dimming Dimming range 100 to 10% Dimming curve Logarithmic dimming curve (standard) Switching to linear dimming curve via masterconfigurator is possible. Dimming interfaces DALI V2-DT6, DSI, ready2mains, corridorfunction V2, switchdim, chronostep Functions Portfolio Description Intelligent Voltage Guard Intelligent Temperature Guard Power-up Fading DC Operation DC level adjustable supporting EN Constant Light Output Configuration Interfaces DALI V2-DT6, ready2mains, U6Me2 c 8 / 60

9 Main values and functions Output current Portfolio Description Adjustable output current Adjustable via... Step size DALI V2-DT6, ready2mains, I-select 2 plug (resistor) 1 ma Tolerance Further information can be found in the data sheet (see Reference list, p. 59) Technical data Portfolio Rated supply voltage Description V Standby losses < 0.16 W... c 9 / 60

10 Housing variants 3.3. Housing variants LCA OTD is available in three different housing sizes: Image Description Housing variant in 30W, 60W, 75W drivers Compact shape for installation inside the luminaire casing (in-built) Typical area of application: Road, street, industry Dimensions: 133 x 77 x 40 mm Housing variant in 120W driver Compact shape for installation inside the luminaire casing (in-built) Typical area of application: Road, street, industry Dimensions: 150 x 90 x 40 mm Housing variant in 160W driver Compact shape for installation inside the luminaire casing (in-built) Typical area of application: Road, street, industry Dimensions: 170 x 100 x 40 mm... c 10 / 60

11 Adjustable output current 3.4. Adjustable output current The output current can be adjusted via DALI V2-DT6, ready2mains, I-select 2 plug (resistor) Adjusting the output current via DALI or ready2mains Further information about DALI (see DALI, p. 46) or ready2mains (see ready2mains, p. 48) can be found in the corresponding function description Adjusting the output current via I-select 2 plugs By inserting a suitable resistor into the I-select 2 interface, the current value can be adjusted. The most important data of the I-select 2 plug looks as follows: Ready-for-use resistor to set output current value Compatible with LED Driver featuring I-select 2 interface; not compatible with I-select (generation 1) Resistor is base isolated Resistor power 0.25 W Current tolerance ± 2 % to nominal current value Compatible with LED Driver series PRE OTD If the resistor is connected by wires a consistent base isolation must be ensured. Furthermore, a max. wire length of 2 m must not be exceeded. Potential interference has to be avoided because it can cause additional tolerance to the output current. To ensure no influence of interference on the resistor value use shielded wires to connect the I-select 2 plug. GND of shielded wire must be connected to the corresponding I-select 2 plug terminal marked with GND in the datasheet. LED modules with on-board I-select 2 resistors may cause irreparable damages, caused by surge / burst peaks. I NOTICE Please note that the resistor values for I-select 2 are not compatible with I-select (generation 1). Installation of an incorrect resistor may cause irreparable damage to the LED module(s). Resistors for the main output current values can be ordered from Tridonic. Further information about accessories can be found on the TRIDONIC homepage (see Reference list, p. 59). I NOTICE The MAX plug, which can be used for LED Drivers of the PRE series, serves as a deactivation plug (CHRO OFF) for LED Drivers of the OTD series and deactivates the chronostep function. c 11 / 60

12 Adjustable output current Adjusting the output current via different resistance values The output current of the LED Driver can be changed by setting different resistances.the resistance values are taken from the E96 series. The relationship between output current and resistor value looks like this: R [kω] = 5 V / Iout [ma] x 1,000 Resistor value tolerance 1 %; resistor power 0.1 W; base isolation necessary I NOTICE The final nominal output current depends on: Tolerance of resistance Tolerance of the device interface (up to 2 %) Output current tolerance of the device Further information about resistance and output current tolerance can be found in the data sheet (see Reference list, p. 59). Unlike DALI and ready2mains which do not generate additional tolerances in the output current, tolerances are higher when using I-select 2 plugs Output voltage The output voltage range results from the selected current. More information can be found in the data sheet (see Reference list, p. 59). The output current can be adjusted via DALI, ready2mains or an I-Select 2 resistor. The diagrams below show the forward voltage ranges as a function of the output current and are intended as a guide. For detailed values and an explanation of the methods available please refer to the data sheets (see Reference list, p. 59). c 12 / 60

13 Adjustable output current LCA PRE OTD 30W LCA PRE OTD 60W c 13 / 60

14 Adjustable output current LCA PRE OTD 75W LCA PRE OTD 120W c 14 / 60

15 Adjustable output current LCA PRE OTD 160W... c 15 / 60

16 Compatibility between LED module and LED Driver 4. Compatibility between LED module and LED Driver There are two stages involved in the check for compatibility between the LED module and the LED Driver. The requirements for compatible operation can be proven by comparing the data sheets Subsequent practical tests can ensure that there are no unexpected problems during actual operation 4.1. Comparison of data sheet values with a 5-point guideline Different values for the two devices need to be considered when comparing the data sheets. The following table shows which values are involved and which requirements they must meet. Comparison of Value in LED module Value in LED Driver Detailed procedure (1) Current I max = Output current Max. DC forward current Output current + tolerances Determine forward current of LED module Check whether LED Driver can be operated with the same output current Check whether max. DC forward current of LED module is greater than or equal to output current of LED Driver (including tolerances) ½ CAUTION! The max. DC forward current can be temperature dependent! Refer to the derating curve of the LED module data sheet (see Reference list, p. 59). continue c 16 / 60

17 Compatibility between LED module and LED Driver Comparison of Value in LED module Value in LED Driver Detailed procedure (2) Voltage Min. forward voltage > Min. output voltage Check whether voltage range of LED module is completely within the voltage range of LED Driver Max. forward voltage < Max. output voltage ½ CAUTION! The forward voltage is temperature dependent! Refer to the Vf/t p diagram in the data sheet (see Reference list, p. 59 ). Min. forward min. dimlevel > Min. output voltage I NOTICE To ensure full dimming performance the forward voltage of the LED module at min. dim level must be greater than or equal to the min. output voltage of the driver. Determine the forward voltage of the LED module at lowest dim level In case there is no data available for the LED module at lowest dim level: take the min. forward voltage minus 20 % as an approximation Check whether the forward voltage of the LED module is greater than or equal to the min. output voltage of the driver (3) LF current ripple Max. permissible LF current ripple Output LF current ripple (<120Hz) Check whether max. permissible LF current ripple of LED module is greater than or equal to output LF current ripple of LED Driver (4) Max. peak current Max. permissible peak current > Max. output current peak Check whether max. permissible peak current of LED module is greater than max. output current peak of LED Driver (5) Power (pertinent for multi channel control gear) Min. power consumption > Min. output power Check whether power range of LED module is completely within output power range of LED Driver c 17 / 60

18 Compatibility between LED module and LED Driver Max. power consumption < Max. output power... c 18 / 60

19 Compatibility between LED module and LED Driver 4.2. Application of the 5-point guideline The compatibility check with the 5-point guideline is shown here using two examples Example 1 Comparison data for LED Driver LED Driver Designation Manufacturer LCA 75W mA one4all C PRE OTD TRIDONIC Data sheet values of LED Driver Output current 700 ma Output current tolerance ± 3 % Min. output voltage 45 V (1) Max. output voltage 107 V (1) Output LF current ripple ± 5 % Max. output current peak Output power 980 ma 75.0 W (1) Values at 700mA c 19 / 60

20 Compatibility between LED module and LED Driver Comparison data for LED module LED module Designation Manufacturer RLE G1 49x223mm 4000lm 830 PL1 EXC OTD Tridonic Data sheet values of LED module Forward current Max. DC forward current 700 ma 1400 ma Typ. forward voltage 33 V +/-10 % (1) Min. forward voltage 43.6 V (1) Max. forward voltage 49.8 V (1) Max. permissible LF current ripple Max. permissible peak current Power draw 1800 ma 2,000 ma W (1) Values at 700 ma Questions Is the LED Driver able to operate two modules? Can the required luminous flux of 3,000 lm be achieved with this combination?... c 20 / 60

21 Compatibility between LED module and LED Driver Procedure Comparison of data sheet values Comparison of Value in LED module Value in LED Driver Result Explanation (1) Current 700 ma = 700 ma To produce a luminous flux of 3,000 lm, the two LED modules must be operated with a forward current of 700 ma. The LED Driver can be set so that it delivers precisely this value of 700 ma as the output current ma 721 ma The output current of the LED Driver including tolerances (700 ma + 3 % = 721 ma) is less than or equal to the max. DC forward current of the LED module (1400 ma). (2) Voltage 87.2 V > 45 V 99.6 V < 107 V The voltage range of the LED module (2 x 43.6 V = 87.2 V; 2 x 49.8 V = 99.6 V) lies completely within the voltage range of the LED Driver ( V). (3) LF current ripple 1800 ma > 735 ma The Output LF current ripple (5 % of output current plus tolerances: [700 ma + 5 %] x 1.05 = 735 ma) of the LED Driver is less than the max. permissible LF current ripple of the LED module (1800 ma). (4) Max. peak current 2000 ma > 980 ma The max. output current peak of the LED Driver (700 ma + 20 % = 980 ma) is less than the max. permissible peak current with which the LED module can be operated (2,000 ma). (5) Power 64.8 W < 75.0 W The power draw of the LED module (64.8 W) is less than the output power of the LED Driver (75.0 W). Result All the values meet the requirements. The components are mutually compatible. With 2 modules a luminous flux of 3,713 lm will be achieved. c 21 / 60

22 Compatibility between LED module and LED Driver Example 2 Comparison data for LED Driver LED Driver Designation Manufacturer LCA 75W mA one4all C PRE OTD TRIDONIC Data sheet values of LED Driver Output current 700 ma Output current tolerance ± 3 % Min. output voltage 45 V (1) Max. output voltage 107 V (1) Output LF current ripple ± 5 % Max. output current peak Output power 980 ma 75.0 W (1) Values at 700mA c 22 / 60

23 Compatibility between LED module and LED Driver Comparison data for LED module LED module Designation Manufacturer Fictitious LED module Other manufacturer Data sheet values of LED module Forward current Max. DC forward current 700 ma 1,050 ma Typ. forward voltage 39.5 V +/-10 % (1) Min. forward voltage V (1) Max. forward voltage V (1) Max. permissible LF current ripple Max. permissible peak current Power draw 630 ma 1,500 ma W (1) Values at 700mA Questions Are the two components mutually compatible? Can the required luminous flux of 1,800 lm be achieved with this combination?... c 23 / 60

24 Compatibility between LED module and LED Driver Procedure Comparison of data sheet values Comparison of Value in LED module Value in LED Driver Result Explanation (1) Current 700 ma = 700 ma To produce a luminous flux of 1,800 lm the LED module must be operated with a forward current of 700 ma. The LED Driver can be set so that it delivers precisely this value of 700 ma as the output current. 1,050 ma 721 ma The output current of the LED Driver including tolerances (700 ma + 5 % = 721 ma) is less than or equal to the max. DC forward current of the LED module (1,050 ma). (2) Voltage V > 45 V V < 107 V The voltage range of the LED module (35.55 V V) is not within the voltage range of the LED Driver (45 V V) (3) LF current ripple 630 ma > 735 ma The Output LF current ripple (2 % of output current plus tolerances: [700 ma + 5 %] x 1.02 = 735 ma) of the LED Driver is not less than the max. permissible LF current ripple of the LED module (630 ma). (4) Max. peak current 1,500 ma > 980 ma The max. output current peak of the LED Driver (700 ma + 20 % = 980 ma) is less than the max. permissible peak current with which the LED module can be operated (1,500 ma). (5) Power W < 75 W The power draw of the LED module (19.75 W) is less than the output power of the LED Driver (75.0 W). Result One of the values does not meet the requirements. The components are not mutually compatible.... c 24 / 60

25 Installation notes 4.3. Practical tests Practical tests are used to ensure fault-free operation of the LED module and LED Driver. The following aspects must be checked Technical aspects Transient behaviour Colour shift Connection during operation Parasitic capacitance Visual aspects Flickering Stroboscopic effect (video applications) Dimming behaviour Colour change/stability Luminous flux Conditions When conducting the tests the following conditions must be considered: All tolerances Entire temperature range Different output voltage ranges (incl. no load) Entire dimming range Short circuit I NOTICE If the values are slightly over or under the specified threshold values or if there are any other concerns or questions please contact Technical Support: techservice@tridonic.com c 25 / 60

26 Installation notes 5. Installation notes I NOTICE The cabling, wiring and mounting for a LED Driver varies depending on the design and manufacturer of the LED module. The following description should therefore not be viewed as comprehensive installation instructions but merely as important general information. To obtain further information, proceed as follows: Read the documentation provided by the lamp manufacturer. Follow the guidelines and instructions of the lamp manufacturer! Observe all relevant standards. Follow the instructions given in the standards! 5.1. Safety information ½ WARNING! Comply with the general safety instructions (see General safety instructions, p. 5)! To avoid failures due to ground faults protect the wiring against mechanical loads from sharp-edged metal parts (e.g. cable penetrations, cable holders, metal frames, etc. LED Drivers from Tridonic are protected for a maximum of 48 hour against overvoltage of up to 320 V. Make sure that the LED Driver is not exposed to overvoltages for long periods! LED Driver LCA PRE OTD from Tridonic have type of protection IP 20. Comply with the requirements for this type of protection!... c 26 / 60

27 Installation notes 5.2. Function of the earth terminal The earth connection is conducted as protection earth (PE). The LED Driver can be earthed via earth terminal or metal housing (if device has metal housing). If the LED Driver will be earthed, protection earth (PE) has to be used. There is no earth connection required for the functionality of the LED Driver. Earth connection is recommended to improve following behaviour. Electromagnetic interferences (EMI) LED glowing at standby Transmission of mains transients to the LED output In general, it is recommended to earth the LED Driver if the LED module is mounted on earthed luminaire parts respectively heat sinks and thereby representing a high capacity against earth Avoiding residual LED glow on standby Residual LED glow on standby may occur as a result of capacitive leakage currents from the LED module onto earthed luminaire parts (such as the heat sink). This mainly affects high-efficiency LED systems with large surface areas installed in luminaires with protection class 1. The topology has been improved so that residual LED glow can be virtually eliminated by earthing the devices. I NOTICE If the LED Driver cannot be earthed or if earthing is not desired, residual LED glow can be minimised by adequate insulation (for example by using heat-conducting double-sided insulation foil) Avoiding the transfer of mains transients to the LED output The transfer of mains transients to the LED output presents a problem for many LED Driver topologies currently on the market, and TRIDONIC devices may be affected. Voltage peaks at the input of the LED Driver may be transferred to the output of the device where they lead to differences in potential between the LED output and earthed luminaire parts. These differences in potential may result in flashovers if the insulation is inadequate or if the creepage and clearance distances are too small. Flashovers will cause the LED module to fail. Earthing the LED Driver attenuates voltage peaks and reduces the likelihood of flashovers. The precise degree of attenuation depends on the capacitance of the LED module with respect to earth. If voltages at the output are higher than 0.5 kv, it is mentioned in the data sheet. c 27 / 60

28 Installation notes Figure: Voltage peaks for LED driver without earthing (left) and with earthing (right) I NOTICE Irrespective of whether the LED Driver is earthed or not, LED modules must be insulated in accordance with the requirements of the luminaire protection class. Improved insulation of the LED module can also reduce the likelihood of flashovers.... c 28 / 60

29 Installation notes 5.3. Routing the wires Tests I NOTICE The performance of the prescribed tests and compliance with relevant standards are the responsibility of the luminaire manufacturer. The following descriptions merely indicate the most important tests and are no substitute for a full research of the relevant standards Insulation and dielectric strength testing of luminaires LED Driver for lamps are sensitive to high-voltage transients. This must be taken into consideration when subjecting luminaires to routine testing during manufacture. According to IEC Annex Q (for information only!) and ENEC 303-Annex A, each luminaire should be subjected to an insulation test for 1 second at 500 V DC. The test voltage is applied between the linked phase/neutral conductor terminal and the protective earth terminal. The insulation resistance must be at least 2 MΩ. As an alternative to measuring the insulation resistance, IEC Annex Q describes a dielectric strength test at 1500 V AC (or x 1,500 V DC). To avoid damaging LED Driver, this dielectric strength test should be performed exclusively for type testing. This test should certainly not be used for routine testing. I NOTICE Tridonic recommends performing an insulation test because a dielectric strength test may damage the device irreparably Type testing Type testing of the luminaire is performed according to IEC Section 10. The wiring for protection class 1 luminaires is tested at a voltage of 2xU + 1,000 V. In order not to overload the LED Driver all the inputs and outputs of the LED Driver are connected to one another. U out is used for measuring the voltage for luminaires with LED Driver with U out > 250 V: For U out 480 V the voltage for the type test is 2000 V. (Routine testing is always performed at 500 V DC) Wiring I NOTICE The wiring procedure is device specific. Further information about wiring, wire cross sections and the length of stripped off insulation can be found in the data sheet. c 29 / 60

30 Installation notes Wiring guidelines The cables should be run separately from the mains connections and mains cables to ensure good EMC conditions. The LED wiring should be kept as short as possible to ensure good EMC. The max. secondary cable length is 2 m (4 m circuit), this applies for LED output as well as for I-select and temperature sensor. Depending on the design of the luminaire it may be possible to improve the radio interference properties by earthing the device at the earth connection. The LED Driver has no inverse-polarity protection on the secondary side. Wrong polarity can damage LED modules with no inverse-polarity protection. Wiring the plug-in terminal Use solid wire or stranded wire with the correct cross-section Strip off correct length of insulation; you may need to twist the tool slightly If stranded wire is used: push onto the terminal from above to be able to insert the wire Insert the bare end into the terminal Detaching the plug-in terminal Push onto the terminal from above to release the wire Pull out the wire at the front 5.4. External fuse for DC operation The internal fuse of an LED Driver is not rated for DC operation. Because of this, an additional external fuse must be used if an LED Driver is operated on a DC network. Proceed as follows: Connect the external fuse to the line labeled "+" which is between the DC power supply and the input terminal of the LED Driver Only use an external fuse with suitable parameters. For LED Drivers with a power of watts the following values are recommended: Rated voltage: 250 V DC rated power: 1 A - 3 A Time-Lag (SLO-Blo ) Tridonic recommends the following external fuse: 477 Series, 5 20 mm, Time-Lag (Slo-Blo ) Fuse Rating 3.15 A c 30 / 60

31 Installation notes 5.5. Maximum loading of circuit breakers Importance of maximum loading A circuit breaker is an automatically operated electrical switch that protects an electrical circuit from damage caused by overload or short circuit. Unlike a fuse that must be replaced if it triggers, a circuit breaker can be reset (either manually or automatically) and used further. Circuit breakers are available in different sizes and with different technical data. The inrush current is a short increased peak current that occurs when an electronic control gear is switched on. In electrical installations, numerous control gear are connected to one circuit breaker. The maximum loading of a circuit breaker indicates how many control gear can be connected to the circuit breaker without triggering the circuit breaker because of the summation of the different inrush currents. The value is calculated through simulation programs based on the circuit breakers characteristic. Information about the maximum loading can be found in Tridonic data sheets. The following table shows the data for LCA 60W mA one4all PRE OTD as an example. Automatic circuit breaker type C10 C13 C16 C20 B10 B13 B16 B20 Inrush current Installation Ø (in mm 2) 1,5 1,5 2,5 4 1,5 1,5 2,5 4 I max time LCA 60W mA one4all PRE OTD A 267 μs Calculation of maximum loading Tripping characteristics of circuit breakers The load at which a circuit breaker triggers is defined by the height and the duration of the applied current. The following table shows exemplary values for different circuit breakers (B10, B13, B16, B20). Duration [μs] Current B10 [A ] peak Current B13 [A ] peak Current B16 [A ] peak Current B20 [A ] peak ,120 1, c 31 / 60

32 Installation notes The combination of both parameters can also be displayed graphically. This results in the tripping characteristic for a certain circuit breaker. Current [A] Duration [μs] I NOTICE Information about the specific tripping characteristics of a circuit breaker must be requested from the respective manufacturer! Calculation of the inrush current The inrush current of a control gear is also defined by its duration and its height. The duration is typically measured as the time between 10 % of maximum current (ascending) and 50 % of maximum current (descending). The following illustration shows the inrush current of a single control gear: c 32 / 60

33 Installation notes If several control gear are connected to one circuit breaker, the individual inrush currents add up. Implementation of the simulation The above-mentioned parameters, height and duration of the current pulse in both the circuit breaker and the control gear, are entered into the simulation program. The result of the simulation is presented in graphical form. The different elements have the following meaning: Circuit breaker: B10, B13, B16, B20 (solid line) represent the tripping characteristics of different circuit breakers. c 33 / 60

34 Installation notes Inrush current: The dotted lines represent different inrush currents. The index of a point signifies the number of control gear, that is, point 1 represents the result for 1 control gear, point 2 the result for 2 control gear, etc. The simulation results can be read as follows: The crossing of the two lines shows the maximum value for the selected combination of circuit breaker and inrush current. The index of the point at this maximum value shows the max. number of control gear. The following example shows the maximum number of control gear at four different circuit breakers: max. 5 devices at circuit breaker B10 (green tripping characteristic) max. 7 devices at circuit breaker B13 (pink tripping characteristic) max. 9 devices at circuit breaker B16 (red tripping characteristic) max. 12 devices at circuit breaker B20 (blue tripping characteristic) c 34 / 60

35 Installation notes I NOTICE The results of different simulations can only be compared if all of the relevant factors are the same. The following points can influence the results: Tripping characteristic used for the circuit breakers Definition used for the duration of the inrush current (Tridonic: %) Gear used for the measurement of the inrush current (especially important: Which electrolytic capacitor is installed in the control gear?) Considering a safety buffer (Tridonic: +20 % for the electrolytic capacitor ) Considering different system impedance Switch-on point used: should always be at max. input voltage Adopted cable lengths and cable data (Tridonic: Cable length 40 cm; Resistivity: Ω * mm 2 / m; inductance: 5 nh / cm; terminal resistance: 2 mω) The modeling of the control gear is performed from the input to the bus voltage electrolytic capacitor. For inductance the saturation values must be used.... c 35 / 60

36 Functions 6. Functions 6.1. corridorfunction V Description The corridorfunction enables the illuminance to be linked to the presence or absence of people. A conventional relay motion sensor is connected. The luminous intensity is increased when a person enters the room. When the person leaves the room the motion sensor switches off after a certain delay and the luminous intensity is automatically reduced. The corridorfunction is particularly beneficial in applications in which light is needed round the clock for safety reasons, for example in public buildings, large apartment complexes, car parks, pedestrian underpasses and underground railway stations. Since the luminous intensity only has to be increased when there is a demand for light, the corridorfunction offers effective lighting management and helps saving energy and costs. Another benefit of the corridorfunction is the enhanced convenience of automatic lighting control. ½ CAUTION! To ensure correct operation a sinusoidal mains voltage with a frequency of 50 Hz or 60 Hz is required at the control input. Special attention must be paid to achieving clear zero crossings. Serious mains faults may impair the operation of switchdim and corridorfunction. Profile settings: Standard profile for activating via 230V on the interface terminal DA/N - DA/L for 5 minutes is "Never off" The LED Drivers have different profiles so they can provide the best possible performance in a range of conditions. The profiles are defined by a series of values: Fade-in time: the time that starts as soon as the presence of a person is detected. During the fade-in time the luminous intensity is faded up to the presence value (default: 0s). Run-on time: the time that starts as soon as the presence of a person is no longer detected. If the presence of a person is detected again during the run-on time the run-on time is restarted from zero. If no presence is detected during the run-on time the fade time is started as soon as the run-on time expires. Fade time: the time during which the luminous intensity is faded from the presence value to the absence value (default: 30s). Switch off delay: the time during which the absence value is held before the lighting is switched off. Depending c 36 / 60

37 corridorfunction V2 on the profile selected the switch-off delay may have different values or may not be defined (default: "Never Off") Absence value: the luminous intensity when there is no person present (default: 10 %). Presence value: the luminous intensity when persons are present (default: 100 %). Variable switch-off times The profiles and their values can be freely adjusted. The values can be adjusted via a connection to a DALI bus Commissioning Activating the corridorfunction Activating the corridorfunction by means of the mains voltage Activating the corridorfunction is simple. If an a.c. voltage of 230 V is applied to the digital interface of the LED Driver for a period of at least 5 minutes the LED Driver detects the corridorfunction and automatically activates it. Activation is required only once per device. There are three procedures for activating by the mains voltage. The requirements are the same in each case. Requirements: The LED Driver is correctly installed in the luminaire Input voltage is applied A motion sensor is connected to information DA/N or DA/L Procedure Version 1: Remain in the activation range of the motion sensor for more than 5 minutes The motion sensor detects movement and switches on The corridorfunction is activated automatically after 5 minutes The light value switches to presence level (default: 100 %) Procedure Version 2: Set the run-on time on the motion sensor to a value greater than 5 minutes Remain in the activation range of the motion sensor for a short time The motion sensor detects movement and switches on The corridorfunction is activated automatically after 5 minutes The light value switches to presence value (default: 100 %) Reset the run-on time of the motion sensor to the required value c 37 / 60

38 corridorfunction V2 Procedure Version 3: Only possible if the motion sensor offers a manual override option Set the slide switch on the motion sensor to the "Never-Off" function Wait 5 minutes The corridorfunction is activated automatically after 5 minutes The light value switches to presence value (default: 100 %) Reset the slide switch on the motion sensor to the "automatic" function Activating the corridorfunction via the masterconfigurator The corridorfunction can also be activated via the masterconfigurator. Further information can be found in the masterconfigurator manual (see Reference list, p. 59). Activating the corridorfunction via ready2mains The corridorfunction can also be activated via ready2mains. Further information can be found in the Product manual ready2mains Programmer (see Reference list, p. 59). Activating the corridorfunction via U6Me2 The corridorfunction can also be activated via U6Me2. Further information can be found in the "Technical information U6Me2 programming" (see Reference list, p. 59). Deactivating the corridorfunction If the corridorfunction is activated the LED Driver is controlled only by motion. To operate the LED Driver via DALI, DSI or switchdim the corridorfunction must be deactivated. Deactivating the corridorfunction via mains Connect mains voltage push button to the terminal marked DA/L Connect neutral conductor to the terminal marked DA/N Press the push button 5 times within 3 seconds Deactivating the corridorfunction via masterconfigurator If the corridorfunction was activated via the masterconfigurator, it can also be deactivated via the masterconfigurator. Further information can be found in the masterconfigurator manual (see Reference list, p. 59). Adjusting the values of the corridorfunction The values of the corridorfunction can be individually adjusted. The values are set via a DALI USB on the bus and by entering special DALI commands, ready2mains commands or U6Me2 commands. Further information can be found in the masterconfigurator manual (see Reference list, p. 59).... c 38 / 60

39 corridorfunction V Installation Requirements: The LED Driver is correctly installed in the luminaire and cabled on the power supply side A motion sensor is installed in the lighting system The motion sensor is connected to the LED Driver Procedure: Connect the neutral wire (N) to terminal DA/N on the LED Driver Connect the output of the motion sensor (switched phase) to terminal DA/L on the LED Driver Wiring versions: c 39 / 60

40 corridorfunction V2 Benefits: Control can be changed at any time to a digital control signal (DSI or DALI) without having to change the luminaire or provide an additional control line ½ CAUTION! Use conventional relay motion sensors! Electronic motion sensors (Triac) are not suitable because of their technical design. ½ CAUTION! Do not use glow switches! Glow switches may affect the control. ½ CAUTION! Make sure that the control line (L') of the motion sensor is connected to terminal DA/L and the neutral wire (N) to terminal DA/N. ½ CAUTION! For five-pole wiring the neutral wire must be connected to DA/N. This prevents 400 V being applied between adjacent terminals if a different phase is used for the control input. I NOTICE For large installations, supply to the LED Driver may be split among several phases (L1, L2, L3). Any phase can be used for the control input. Any number of motion sensors can be connected in parallel.... c 40 / 60

41 DSI 6.2. DSI Description DSI (Digital Serial Interface) enables DSI LED Driver to be controlled. The DSI line can be wired separately via a two-core cable or together with the mains cable in a five-core cable. Communication is not impaired by the mains cable. In contrast to DALI, there is no individual addressing of the LED Drivers with DSI. DSI offers a series of benefits: Expansion options via submodules, for example in combination with daylight control or additional switch modules Wiring: Simple wiring with five pole standard cables and line length of up to 250 meters Wiring: Polarity-free control lines can be used for mains and control lines Wiring: Multiple wiring possibilities (star, series and mixed wiring) Unaffected by electrical interference Uniform light level from the first to the last light source reverse polarity protected connection: can be connected with any polarity The main benefits of DSI are the optimization of energy consumption of extensive groups of luminaires (e.g. in sports stadiums and factories) Commissioning I NOTICE If the corridorfunction is activated, the LED Driver is controlled only by motion. To operate the LED Driver via DALI, DSI or switchdim, the corridorfunction must be deactivated. Further information can be found in the DALI Handbook (see Reference list, p. 59).... c 41 / 60

42 switchdim 6.3. switchdim Description With the switchdim function it is possible to use the mains voltage as a control signal. The phase of a simple standard mains voltage push button is connected to the terminal marked DA/L and the neutral conductor is connected to the terminal marked DA/N. Using the function is easy and convenient: A short press ( ms) switches the device on or off A long press (> 600 ms) fades the connected operating device alternately up and down (between 1 and 100 %). switchdim is therefore a very simple form of lighting management. It also has a positive effect on material and labor costs. The device has a switchdim memory function. This is used, among other things, for storing the last dimming value in the event of interruptions in the power supply. When power returns, the LED is automatically restored to its previous operating state and dimmed to the last value. ½ CAUTION! Glow switches are not approved for controlling switchdim. Glow switches may cause the LED Driver to spontaneously switch on or off or make sudden changes in the dimming value. ½ CAUTION! To ensure correct operation a sinusoidal mains voltage with a frequency of 50 Hz or 60 Hz is required at the terminal. Special attention must be paid to achieving clear zero crossings. Serious mains faults may impair the operation of switchdim and corridorfunction. ½ CAUTIONS! A maximum number of 25 operating devices per switchdim system should not be exceeded. If you have more devices, please use DALI or DSI Commissioning I NOTICE If the corridorfunction is activated, the LED Driver is controlled only by motion. To operate the LED Driver via DALI, DSI or switchdim, the corridorfunction must be deactivated. c 42 / 60

43 switchdim Using the switchdim function switchdim is operated by the mains voltage push button. Procedure: Switch the device on/off by briefly actuating the push button -or- Dim the device by holding down the push button Synchronising devices If the devices in a system do not operate synchronously, the devices must be synchronized, i.e. put in the same status (on/off). Procedure: Hold down the push button for 10 seconds All devices will be synchronized to the same status LEDs will will be set to a uniform light value (approx. 50 %) The fading time will be set to its default value (approx. 3 seconds) Changing the fading time The default value for the fading time is approx. 3 seconds. It can be changed to approx. 6 seconds. Procedure: Hold down the push button for 20 seconds After 10 seconds: all devices will be synchronized to the same status After 20 seconds: a fading time of approx. 6 seconds will be set LEDs will be set to a uniform light value (approx. 100 %) Switching the LED Driver to automatic mode In automatic mode the device detects which control signal (DALI, DSI, switchdim, etc.) is connected and automatically switches to the corresponding operating mode. Procedure: Press the push button 5 times within 3 seconds Installation Wiring variants There are two options for installing switchdim: four-pole and five-pole wiring c 43 / 60

44 switchdim Four-pole wiring Configuration: Phase (L), neutral (N), earth (PE), control line (L') Benefits: No need for a control line thanks to bridging terminal DA/N and the N-connection of the luminaire Five-pole wiring Configuration: Phase (L), neutral (N), earth (PE), control line (L'), control line neutral (N') Benefits: Control can be changed at any time to a digital control signal (DSI or DALI) without having to change the luminaire or provide an additional control line. ½ CAUTION! For five-pole wiring the neutral conductor must be connected to DA/N. This prevents 400 V being applied between adjacent terminals if a different phase is used for the control input.... c 44 / 60

45 Power-up fading 6.4. Power-up Fading Description The power-up fading function offers the opportunity to realize a soft start. The soft start will be applied when the mains supply is switched on and during operation with switchdim. The function is programmed as a DALI fade time in the range from 0.7 to 16 seconds and dims in the selected time from 0 percent to the power-on level. By factory default power-up fading is not active (0 seconds) Commissioning Procedure via the masterconfigurator Open dialog box "Tridonic-specific configuration" Click tab "Power-up Fading" Choose value from drop-down menu "Power-up Fading" Click "save" Changes are saved Further information can be found in the masterconfigurator manual (see Reference list, p. 59).... c 45 / 60

46 DALI 6.5. DALI Description DALI standard I NOTICE LCA PRE devices support the new DALI standard V2 (according to EN ). DALI (Digital Addressable Lighting Interface) is an interface protocol for digital communication between electronic lighting equipment. The DALI standard was developed by Tridonic together with renowned manufacturers of operating and control equipment. Today, these manufacturers belong to the DALI Activity Group which promotes the use and further development of DALI. The DALI standard is defined in IEC A test procedure standardized by the DALI Activity Group ensures compatibility between products from different manufacturers. Tridonic products have undergone this test and meet all the requirements. This is indicated by the logo of the DALI Activity Group on the device. The agreement by the lighting industry to adopt a common protocol has opened up a virtually unlimited number of options. With the right choice of individual DALI components an extremely wide range of requirements can be met, from operating a simple light switch to lighting management systems for entire office complexes with thousands of light sources. DALI in Action DALI offers a lot of possibilities: DALI line: 64 control gear can be grouped to a line DALI groups: Every control gear can be attributed into 16 groups Addressability: All control gear are individually addressable Grouping: Possible without complicated rewiring Programmability: Individual programmability makes it possible to use functions which transcend the DALI standard Monitoring: Easily possible thanks to status feedback Wiring: Simple wiring with five pole standard cables and a cable length of max. 300 metres Wiring: Polarity-free control lines can be used for mains and control lines Wiring: Multiple wiring possibilities (star, series and mixed wiring) Unaffected by interruptions: All luminaires receive the same, unaffected digital signal and dimming level Similar light level from first to last luminaire Technical data of a DALI line: DALI voltage: 9.5 V DC Maximum DALI system current: max. 250 ma c 46 / 60

47 DALI Data transfer rate: 1200 Baud Maximum line length: up to 300 m (for 1,5 mm 2) Commissioning I NOTICE If the corridorfunction is activated the LED Driver is controlled only by motion. To operate the LED Driver via DALI, DSI or switchdim the corridorfunction must be deactivated. Further information can be found in the DALI Handbook (see Reference list, p. 59). ed ed ("enhanced DALI") offers extended DALI commands. They can be used to activate specific commands of the LED Driver. The masterconfigurator software works with ed commands. These commands are Tridonic specific. They are not part of the DALI standard and are not publicly available.... c 47 / 60

48 ready2mains 6.6. ready2mains Description ready2mains uses the mains cable to transmit information: easily, reliably and professionally. Luminaires are controlled and dimmed directly via the mains, with no need for any additional wiring. ready2mains can be used to configure both drivers with a separate communication interface as well as fixed output drivers. The configuration saves time and is very flexibel. ready2mains reduces production costs and installation costs and also reduces possible sources of error. Dimming ready2mains allows for mains-based group dimming, controlled via the ready2mains protocol and appropriate dimming interfaces. For details on the operation of ready2mains and its components see the relevant technical information. Easy refurbishment of dimmable and non-dimmable installations No rewiring within the ceilings Allows cost-effective solutions Configuration The ready2mains interface can be used to configure the main parameters of LED Drivers via the mains wiring (LED output current, CLO and DC level). These parameters can be adjusted either via ready2mains-capable configuration software or directly via the ready2mains programmer (output current only). Further information can be found in the Leaflet ready2mains (see Reference list, p. 59).... Easy configuration of luminaires Simple integration in existing test setups c 48 / 60

49 Constant Light Output 6.7. Constant Light Output Description The light output of an LED module reduces over the course of its life. The Constant Light Output function compensates for this natural decline by constantly increasing the output current of the LED Driver throughout its life. As a results, a virtually uniform light output is achieved at all times. For configuration purposes the expected module-specific values for lifetime and residual luminous flux must be specified. The output current is then controlled automatically on the basis of these values. The LED Driver typically starts with an output current ("Required Intensity") that corresponds to the expected residual luminous flux and calculates the increase in the value on the basis of the anticipated lifetime. If the OTL function is enabled, visual feedback is given as soon as the LED exceeds the expected LED lamp life. If the expected LED lamp life is exceeded, the luminaire flashes for 2 seconds after being switched on Commissioning Procedure via the masterconfigurator I NOTICE To be able to adjust the parameters "Required intensity", "LED burning hours" and "Expected LED life", the "Advanced settings" must be activated. Further information can be found in the masterconfigurator manual (see Reference list, p. 59). Activating the Constant Light Output function Open dialog box "Tridonic-specific configuration" Click tab "CLO and OTL" Set drop-down menu "Constant intensity" to "enabled" Click "save" Changes are saved Activating the Over the Lifetime function Open dialog box "Tridonic-specific configuration" Click tab "CLO und OTL" Set drop-down menu "Visual feedback" to "enabled" Click "save" Changes are saved c 49 / 60

50 Constant Light Output Setting Required intensity and Expected LED life Open dialog box "Tridonic-specific configuration" Click tab "CLO and OTL" Enter values in input fields "Required intensity" and "Expected LED life" Click "save" Changes are saved Transferring existing values to a new control gear If a LED Driver is replaced the existing parameter values can be transferred to the new LED Driver. Chose a LED Driver that is in the same room as the new LED Driver Open dialog box "Tridonic-specific configuration" Click tab "CLO and OTL" Note down the values for "Required intensity", "LED burning hours" and "Expected LED life" Close dialog box "Tridonic-specific configuration" Chose the new LED Driver Open dialog box "Tridonic-specific configuration" Click tab "CLO and OTL" Take the noted values and enter them in the input fields "Required intensity", "LED burning hours" and "Expected LED life" Click "save" Changes are saved Replacing the LED module If an LED module is replaced, the parameter "LED burning hours" must be set to "0". Open dialog box "Tridonic-specific configuration" Click tab "CLO and OTL" Delete value from input field "LED burning hours" CLO function is automatically restarted Changes are saved Further information can be found in the masterconfigurator manual (see Reference list, p. 59).... c 50 / 60

51 DC recognition 6.8. DC recognition Description In emergency light systems with central battery supply the DC recognition function uses the input voltage to detect that emergency mode is in place. The LED Driver then automatically switches to DC mode and dims the light to the defined DC level. Without DC recognition different and more complex solutions need to be applied in order to detect emergency mode. LED Drivers of the LCA PRE series are factory preset to a DC level of 15 %. This value can be customized. Further information can be found in the masterconfigurator manual (see Reference list, p. 59). I NOTICE The LED Driver is designed to operate on DC voltage and pulsing DC voltage. In DC recognition connected sensors are ignored.... c 51 / 60

52 Dimming on DC 6.9. Dimming on DC Description If Dimming on DC is activated the requirements of the DC recognition function are ignored. Even if DC is detected, the LED Driver continues to behave as in AC mode: The present dimming level is retained An emergency light level defined for the DC recognition function (DC level) is ignored Control signals via DALI and DSI continue to be executed Commissioning ½ WARNING! If Dimming on DC is activated, the emergency mode is not recognised. The device no longer automatically switches to the emergency light level. Make sure that if Dimming on DC is activated an appropriate dimming level is selected for the emergency lighting mode. Please also note the following: Dimming on DC may only be activated by trained personnel A security code must be entered before activation The security code is issued only after a consent form has been signed Dimming on DC must not be used in emergency lighting systems according to EN Procedure with masterconfigurator Further information can be found in the masterconfigurator manual (see Reference list, p. 59).... c 52 / 60

53 Intelligent Temperature Guard Intelligent Temperature Guard ½ WARNING! The t temperature is the maximum permitted temperatur in terms of safety. Operating the LED Driver above the c permitted t temperature is not compliant with relevant standards! c The Intelligent Temperature Guard function does not replace the proper thermal design of the luminaire and does not enable the lighting to operate for lengthy periods of time in impermissible ambient temperatures Description The Intelligent Temperature Guard function provides protection against temporary thermal overloads. It slowly reduces the output if the maximum t c temperature is exceeded. This way instant failure of the LED Driver can be prevented. Thermal overload protection is triggered as soon as the t c temperature is exceeded by around 5 to 10 C. The precise trigger temperature depends on the device. The value is chosen so that the protection function is not performed until there is a significant impact on rated life. The output is reduced in small stages that are generally imperceptible to the user: The temperature is checked every two minutes If the temperature is too high, the output is reduced by about 2 % This process is repeated until the LED Driver returns to its permitted temperature range The maximum output reduction is 50 % The following table shows the exact behaviour and parameters of the Intelligent Temperature Guard function for LCA OTD. LCA OTD Start of power reduction 10 C above t c (1) Power reduction rate Reduction of max level by 1 DALI step / 2 min Power reduction method Analogue dimming ( %) Power reduction process and control Power reduction is dependent on temperature: Power reduction continues if temperature still rises Power reduction stops if temperature does not rise anymore or if max power reduction is reached (min power level = 50 %) Min power level 50 % dimming level c 53 / 60

54 Intelligent Temperature Guard Shut off behavior No shut off behavior: Device will not shut off if temperature still rises. AC mode: Device switches to 50 % dimming level DC mode: Device switches to 50 % dimming level Automatic restart behavior No automatic restart behavior (because there is no shut off behavior) Device stays at 50 % dimming level Restart temperature No restart temperature (1) Rated t c is device specific. (2) Flicker will be visible because of PWM frequency. I NOTICE The standard setting for the dimming curve is logarithmic: If alternative dimming curves are used the power reduction can be implemented differently.... c 54 / 60

55 Intelligent Temperature Guard Intelligent Voltage Guard Description The Intelligent Voltage Guard (IVG) function warns of possible damage due to overvoltage or undervoltage. Mains voltage is constantly monitored and appropriate responses are then made: If the mains voltage is too low (< 70 V), the LED Driver is switched off At undervoltages between 70 and 140 V, the LED Driver switches off and on again on a non-cyclic basis. In the case of overvoltage (> 318 V), the device sends feedback via DALI One of the main causes for overvoltage is a wiring fault or a break in the neutral conductor in the three-phase network. By indicating overvoltage, Intelligent Voltage Guard also helps detecting these problems. ½ WARNING! Continuous operation (approx. 1 hour) at overvoltage (> 320 V) will destroy the LED Driver. If the device flashes, disconnect the entire lighting system circuit. I NOTICE If overvoltage is detected, the connected sensors are ignored.... c 55 / 60

56 Surge Burst protection Surge Burst protection Description In the case of protection against overvoltage, it is decisive between which connections the overvoltage occurs. Lightning strikes cause an overvoltage between the live power lines and the ground. LED Drivers from Tridonic offer a protection of 10 kv and meet protection classes I and II according to standard IEC This means safety for the LED module and the LED Driver. With a protection of 10 kv, lightning can strike up to approx. 150 m away from the lighting pole without damaging the module. This means that with LCA PRE OTD drivers 5 out of 10 luminaires are protected. Compared to this, with a 6 kv protection only 1 out of 10 luminaires are protected. This better protection has clear advantages: Fewer luminaires must be serviced or replaced Therefore, maintenance costs are lower Bursts According to Standard IEC Ed. 2.0 (2009) tests are conducted according to IEC , with test levels as given in Tables 4 to 6. Fast transients with positive and negative polarity are applied to the device for a minimum of 2 minutes each Surges Tests are conducted according to IEC , with test levels as given in Table 10 of this standard. Pulses shall be applied to the a.c. voltage wave as follows: five positive polarity pulses at the 90 phase angle five negative polarity pulses at the 270 phase angle Two test levels are given for different types of lighting equipment Surge Burst protection (values) The 30 W, 60 W and 75 W versions of LCA PRE OTD have the following Surge Burst protection: Mains surge capability (between L N) 6 kv / 3 ka (6 L-N according to EN Ohm, 1.2/50 µs, 8/20 µs) Mains surge capability (between L/N PE) 6 kv Mains surge capability (between L/N PE) without DALI connection up to 10 kv Burst protection 6 kv The 120 W and 160 W versions of LCA PRE OTD have the following Surge Burst protection: c 56 / 60

57 Surge Burst protection... Mains surge capability (between L N) 6 kv / 3 ka (6 L-N according to EN Ohm, 1.2/50 µs, 8/20 µs) Mains surge capability (between L/N PE) 6 kv Mains surge capability (between L/N PE) without DALI connection up to 10 kv Burst protection 6 kv c 57 / 60

58 chronostep chronostep Description In the outdoor lighting and street lighting sector, it often makes sense to dim the lighting level during the night hours in order to save energy. The chronostep V2 function is a tool that makes this easy to do. The LED Driver automatically measures the switch-on and switch-off times of the lighting installation over the past three days. The switch-on and switch-off times are typically the times at which the sun sets and rises. The midpoint of these two reference points is the time referred to as Virtual Midnight. To allow immediate operation in the first night, it is possible to program the Virtual Midnight manually. The overall time between switch-on and switch-off is called On-Time. Overall there are 8 profiles, 5 are predefined by factory and 3 can be programmed by the customer using the mains programming protocol U6Me2. Via U6Me2 it is possible to set profiles and output current and to reset the profile values. Programming is also possible via DALI or ready2mains. Profiles: Default profile: Profile 1 Profile 0 - Light output is set to 100 %, chronostep deactivated Profile 1 - Factory default if chronostep mode is activated Profile 1-4 predefined Profile 5-8 user defined and programmable Programming via ready2mains und DALI More information can be found in the chronostep 2 instruction manual (see Reference list, p. 59). I NOTICE The MAX plug, which can be used for LED Drivers of the PRE series, serves as a deactivation plug (CHRO OFF) for LED Drivers of the OTD series and deactivates the chronostep function.... c 58 / 60